I am looking to buy a full carbon bike. I looked at some in the price range of $1800-$3000, and I found they didn't really feel much lighter than aluminum bikes. Is that just the reality of carbon bikes in this price range? Because I just remember a while back picking up someone's carbon bike (can't remember the make), and I lifted it above my head with one hand like it was nothing. I can't believe changing the components to dura ace would make that much of a difference. What do you guys think? Would you recommend like say the Giant TCR Composite 2? Or even the Giant TCR Advanced 3?